Forensic evidence record · ev-pa1460048-f-north-wales-pfos
Perfluorooctanesulfonic acid (PFOS)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
11.1 ng/LReported measurementSource observations (16)
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0052 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-01 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01046-01 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0062 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-03 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Detected above reporting limit. = 0.0057 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01046-03 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0095 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-05 · Method EPA 533
- PFOS — Sample date: 2025-03-19
Detected above reporting limit. = 0.005 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5C03666-01 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0104 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-07 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Detected above reporting limit. = 0.0095 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01046-07 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0111 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-11 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Detected above reporting limit. = 0.0108 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01046-11 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Detected above reporting limit. = 0.0078 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01711-13 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Detected above reporting limit. = 0.0059 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01046-13 · Method EPA 533
- PFOS — Sample date: 2024-08-14
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4H01712-01 · Method EPA 533
- PFOS — Sample date: 2024-11-13
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 4K01088-01 · Method EPA 533
- PFOS — Sample date: 2025-02-11
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5B01045-01 · Method EPA 533
- PFOS — Sample date: 2025-05-14
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 5E01858-01 · Method EPA 533
Measurement evidence
- Analyte
- Perfluorooctanesulfonic acid (PFOS)
- Result qualifier
- =
- Reference basis
- 4.0 ng/L federal MCL (2024)
- Sampling location
- Entry Point to Distribution
- Water system ID
- PA1460048
- Source ID
- src-ucmr5-2024
Laboratory context
No laboratory method note was published with this record.
Sampling context
This result represents a entry point to distribution sample. It does not establish the condition at every distribution point or household tap.
Record limitation
System-level entry-point monitoring; not a measurement of the water at an individual household tap.
Source provenance
UCMR5 Analytical Results
Fifth Unregulated Contaminant Monitoring Rule (UCMR5) — PFAS occurrence data
U.S. Environmental Protection Agency · Published 2024
Nationwide entry-point monitoring for 29 PFAS and lithium under the fifth UCMR cycle. Results are entry-point-to-distribution samples, not household-tap measurements.
How to interpret this record
This page preserves one measurement. Interpretation requires its qualifier, reporting limit, reference basis, date, sampling location, and limitations; the number alone is not a safety verdict.
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